<div class="form-group rule">
  <div class="col-lg-1 col-lg-offset-2 control-label">送</div>
  <div class="col-lg-2">
    <input type="text" class="form-control" name="son[]" value="{{isset($attrs['son_0'])?$attrs['son_0']:''}}" data-rule-number="true" data-rule-required="true"/>
  </div>
</div>